June 23, 2016
Fingerprint unlock is actually a quite amazing feature and it would be cool to be able to use them in our Smart Launcher lock screens. Unfortunately, this won’t be possible and the reason is quite easy to understand.
In order to enable you to use fingerprint in apps, Android forces you to enable a pattern or pin secured lock screen. Since the Smart Launcher lock screens, like any other lock screen on the Play Store, work on a unofficial implementation, there is no way for them to overlap the stock lockscreen. So, we’re sorry, it’s not a bug but a limitation that can be removed only by a Google in future releases of Android.
We will keep you updated.